Description : In this paper we introduced a new MAC sub-layer protocol for multi-hop Real-Time Wireless Sensor Networks (RTWSNs). This protocol makes it possible to transmit time-constrained data with given priorities and end-to-end delays. Such data are needed in multimedia applications implemented in RTWSNs. We carried out a comprehensive analysis of our protocol. Moreover, we included in this protocol a topology control mechanism which allowed us to determine the critical transmitting range. We simulated and analyzed the performance measures ....etc

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Wireless MAC Protocol Using Implicit Pipelining (Java)
IEEE Transactions on Mobile Computing, Vol. 5, No. 3,


Abstract: In distributed multiple access control protocols, two categories of overhead are usually associated with contention resolution. One is channel idle overhead, where all contending stations are waiting to transmit. Another is collision overhead, which occurs when multiple contending stations attempt to transmit simultaneously. Either idle overhead or collision overhead being large, contention resolution algorithm wo ....etc

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sir
i am the student of M.tech.and i am working on wireless sensor network MAC protocols.
please send me the MATLAB coding for average packet latency in T-MAC and S-MAC protocols.on my mail id...([email protected]).

Anjali Varshney ....etc

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Abstract
The third generation(3G) wireless network is envisaged as the next generation wireless solution for meeting the demand of its users. It promises to provide wireless access to multimedia applications at rates upto 2Mbps. But the problems of intermittent disconnection, high error rate in wireless networks can cause degradation of protocols and compromise the QoS (Quality-of-Service) guaranteed to the users. So, there is a need for adaptive protocols, which, on determining the current adverse wireless network conditions, adapt t ....etc

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Mac OS X is a line of graphical operating systems developed, marketed, and sold by Apple Inc., the latest of which is pre-loaded on all currently shipping Macintosh computers. Mac OS X is the successor to the original Mac OS, which had been Apple's primary operating system since 1984. Unlike the earlier Macintosh operating system, Mac OS X is a Unix-based operating system built on technology developed at NeXT from the second half of the 1980s until early 1997, when Apple purchased the company. The first version released was Mac OS X Server 1.0 ....etc

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Abstract—The pervasive adoption of IEEE 802.11 radios in the past decade has made possible for the easy Internet access from a vehicle, notably drive-thru Internet. Originally designed for the static indoor applications, the throughput performance of IEEE 802.11 in the outdoor vehicular environment is, however, still unclear especially when a large number of fast-moving users transmitting simultaneously. In this paper, we investigate the performance of IEEE 802.11 DCF in the highly mobile vehicular networks. We first propose a simple yet accu ....etc

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sir...
please send me the MATLAB code for energy consumption in S-MAC and Token BAsed MAC Protocol. on my mail id ([email protected])


Anjali Varshney ....etc

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Presented by:
Amit Agrawal


Wireless LAN Simulation- IEEE 802.11 MAC Protocol
Project Goals
• MATLAB simulation
- DCF (Distributed Coordination Function)
- No Propagation Delay
• Performance Analysis
- Number of Nodes
- Range
- Packet Size
- RTS/CTS
DCF
• DCF
- CSMA/CA is a DCF
• Salient features
- Medium sharing through CSMA/CA
- Allows one to use the medium
- Random Back off interval before retransmission
- Refinement – RTS/CTS packets
[b ....etc

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Z-MAC: A Hybrid MAC for Wireless Sensor Networks

Presented By:-
Subodh Kumar Gond
Roll. No. 08EC6415
M.Tech. 1st Year
Telecommunication System Engineering


Introduction

What is MAC
-Controlling access to the channel
What is Z-MAC

- A Hybrid MAC which Combine the strengths of CSMA and TDMA while offsetting their weakness.

- The main feature of Z-MAC is its adaptability to the level of contention in the network .

CSMA (Carrier Sense Multiple Access)
¢ ....etc

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ABSTRACT
We propose a CDMA-based power controlled medium accessprotocol for mobile ad hoc networks (MANETs). Unlikepreviously proposed protocols, ours accounts for the multipleaccess interference (MAI), thereby addressing the notoriousnear-far problem that undermines the throughputperformance in MANETs. Channel-gain information obtainedfrom overheard RTS and CTS packets over an outof-band control channel is used to dynamically bound thetransmission power of mobile terminals in the vicinity ofa receiver. By properly estimating the requi ....etc

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